Pontiac 1997 Sunfire Owner's Manual page 229

3. Then fill the coolant surge tank with the proper mix.
up to the FULL COLD mark.
4.
With the coolant surge tank pressure cap off, start the
engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the
engine fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more
of
the proper mix to
the
coolant surge tank
until the level reaches the FULL COLD mark.
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